2155297 has 2 divisors, whose sum is σ = 2155298. Its totient is φ = 2155296.

The previous prime is 2155291. The next prime is 2155319. The reversal of 2155297 is 7925512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 55696 = 1449^2 + 236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155297 is a prime.

It is a Chen prime.

It is equal to p₁₅₉₆₁₉ and since 2155297 and 159619 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2155291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077648 + 1077649.

It is an arithmetic number, because the mean of its divisors is an integer number (1077649).

2^2155297 is an apocalyptic number.

It is an amenable number.

2155297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155297 is an equidigital number, since it uses as much as digits as its factorization.

2155297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 2155297 is about 1468.0929807066. The cubic root of 2155297 is about 129.1721955779.

The spelling of 2155297 in words is "two million, one hundred fifty-five thousand, two hundred ninety-seven".